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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC5200B датащи(PDF) 17 Page - Freescale Semiconductor, Inc |
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MPC5200B датащи(HTML) 17 Page - Freescale Semiconductor, Inc |
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17 / 78 page  Electrical and Thermal Characteristics MPC5200B Data Sheet, Rev. 1 Freescale Semiconductor 17 NOTES: Make sure that the PORRESET does not carry any glitches. The MPC5200B has no filter to prevent them from getting into the chip. HRESET and SRESET must have a monotonous rise time. The assertion of HRESET becomes active at Power on Reset without any SYS_XTAL clock. For additional information, see the MPC5200B User Manual [1]. 3.3.3.1 Reset Configuration Word During reset (HRESET and PORRESET) the Reset Configuration Word is latched in the related Reset Configuration Word Register with each rising edge of the SYS_XTAL signal. If both resets (HRESET and PORRESET) are inactive (high), the contents of this register will be locked immediately with the SYS_XTAL clock (see Figure 3). Figure 3. Reset Configuration Word Locking Table 15. Reset Rise / Fall Timing Description Min Max Unit SpecID PORRESET fall time — 1 ms A3.4 PORRESET rise time — 1 ms A3.5 HRESET fall time — 1 ms A3.6 HRESET rise time — 1 ms A3.7 SRESET fall time — 1 ms A3.8 SRESET rise time — 1 ms A3.9 sample sample sample sample sample sample sample sample sample sample LOCK RST_CFG_WRD HRESET PORRESET SYS_XTAL 4096 clocks |
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